Not receiving Verizon texts -mostly at night

Not receiving Verizon texts -mostly at night

I have an iPhone 4 (although I experienced this problem when I had the 3GS as well). I'm sporadically not receiving texts from my Verizon contacts. Lately it has been happening almost every night after/around 10pm-2am...sometimes they'll come delayed a few hours later; sometimes the next day, sometimes not at all. This was a problem back in the fall months too, and I had read that it was something AT&T and Verizon were working together to resolve...Any ideas? Is this going to be resolved any time soon?